Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for distributively mapping virtual resource blocks (VRBs) to physical resource blocks (PRBs) in a wireless mobile communication system, the method comprising: interleaving by a base station, indexes of the VRBs, of a downlink data packet using a block interleaver; mapping the interleaved indexes onto a first slot and a second slot of a subframe of a downlink data packet with a gap for distribution; and transmitting the mapped data packet to a user equipment, wherein an index o 1,d of one of the PRBs on the first slot mapped to a given index d of one of the VRBs is set to p 1,d +N offset if a temporary index p 1,d of one of the PRBs on the first slot mapped to the index d by the block interleaver is larger than N DVRB /2, and an index o 2,d of the one of the PRBs on the second slot mapped to the index d is set to p 2,d +N offset if a temporary index p 2,d of one of the PRBs on the second slot mapped to the index d by the block interleaver is larger than N DVRB /2, wherein N DVRB is a number of the VRBs and N offset is a predetermined integer, and wherein d has an integer value in a range from 0 to N DVRB −1, and p 1,d , p 2,d , o 1,d , and o 2,d have an integer value in a range from 0 to N PRB −1, N PRB being a number of the PRBs in the wireless mobile communication system, wherein the wireless mobile communication system supports a resource allocation scheme.
2. The method according to claim 1 , wherein N offset =N PRB −N DVRB .
3. The method according to claim 1 , wherein N offset =N gap −N DVRB /2.
4. The method according to claim 1 , wherein the temporary index P 1,d is given in expression (1), and the temporary index p 2,d is given in expression (2), wherein expression ( 1 ) is p 1 , d = { p 1 , d ′ , when N null = 0 or ( d < N DVRB - N null and mod ( d , C ) < 2 ) p 1 , d ′ - N null / 2 , when N null ≠ 0 and ( d < N DVRB - N null and mod ( d , C ) ≥ 2 ) where p 1 , d ′ = mod ( d , C ) · R + ⌊ d / C ⌋ p 1 , d = { p 1 , d ′ - R + N null / 2 , when N null ≠ 0 and ( d ≥ N DVRB - N null and mod ( d , C / 2 ) = 0 ) p 1 , d ′ - R , when N null ≠ 0 and ( d ≥ N DVRB - N null and mod ( d , C / 2 ) = 1 ) where p 1 , d ′ = mod ( d , C / 2 ) · 2 R + ⌊ 2 d / C ⌋ ; and expression ( 2 ) is p 2 , d = mod ( p 1 , d + N DVRB / 2 , N DVRB ) where R is a number of rows of the block interleaver, C is a number of columns of the block interleaver, N DVRB is a number of resource blocks used for the VRBs, and ‘mod’ means a modulo operation.
5. The method according to claim 1 , wherein the wireless mobile communication system supports a resource allocation scheme in which one resource block group (RBG) including consecutive PRBs is indicated by one bit, and wherein the gap for the distribution is a multiple of a square of a number of the consecutive PRBs constituting the RBG.
7. The method according to claim 1 , wherein a degree of the block interleaver is equal to a diversity order (N DivOrder ) determined by the distribution.
8. The method according to claim 1 , wherein the wireless mobile communication system supports a resource allocation scheme in which one resource block group (RBG) including consecutive PRBs is indicated by one bit, and wherein the number of the VRBs (N DVRB ) is a multiple of a value obtained by multiplying a square of the number of the consecutive PRBs constituting the RBG (M RBG 2 ) by a number of the PRBs to which one VRB is mapped (N D ).
10. The method according to claim 9 , wherein the number of the VRBs (N DVRB ) is given as expression (3) when nulls are input to the block interleaver, wherein expression (3) is N DVRB =min(N PRB −N gap , N gap )·2.
11. The method according to claim 7 , wherein the diversity order (N DivOrder ) is an integer multiple of a number of PRBs to which one VRB is mapped (N D ).
12. The method according to claim 1 , further comprising receiving a resource indication value (RIV) at a mobile station of the wireless mobile communication system, wherein the RIV is used to determine the indexes of the VRBs and indicates a start index number of the VRBs and a length of the VRBs.
13. The method according to claim 1 , wherein the gap is 0 when N DVRB is larger than or equal to a predetermined threshold value (M th ).
14. The method according to claim 1 , wherein N DVRB is an integer multiple of a diversity order (N DivOrder ) determined by the distribution.
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June 1, 2010
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